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Multi-Color/Multi-Material

Engel combines its multi-color and multi-component applications under one umbrella: Combimelt. Over the years, we've delivered over 2000 Combimelt systems with up to six independent injection units.

A rotary table, attached to the moving platen, is available to optimize the molding of complex multi-color parts. As an alternative to rotary table machines, standard machines with in-mold index plates can also be used to facilitate multi-color molding. All systems are built using standard Engel components, with control being fully integrated on the Engel distributed-intelligence machine controller.

You can now produce parts with extraordinary performance using different plastics in multi-layer structures. For example, a hard core of reinforced material with a surface of thermoplastic elastomer or rubber/thermoplastic composites can be used without requiring adhesive agents to replace rubber/metal composite structures. (Snap-On Partnership)

Co-injection

When two plastic materials are co-injected, the outer skin layers are usually responsible for the high-quality surface. Filling materials, injected into the enclosed core material, improve mechanical properties and the dimensional stability under a wide range of temperatures.

It's possible to reduce component cost and lower weight with a foamed inner core. Conversely, the inner component can be made of a high-performance barrier material -- as in packaging -- allowing plastic to replace conventional materials such as glass.

Engel's co-injection solution incorporates all the primary features of our multi-color systems, including seamless integration, the use of standard components and our proven technology. The system also includes a unique, high-precision nozzle that ensures even melt distribution.